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Energy Harvesting Characteristics of Spring Supported Piezoelectric Cantilever Structure (SPCS)

압전 캔틸레버 스프링 구조물(SPCS)의 에너지 하베스팅 특성

  • Kim, Kyoung-Bum (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Kim, Chang-Il (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Jeong, Young-Hun (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Lee, Young-Jin (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Cho, Jeong-Ho (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Paik, Jong-Hoo (Electronic and Material Ceramics Division, Korea Institute of Ceramic Engineering & Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University) ;
  • Seong, Tae-Hyeon (Department of Electrical Engineering, Hanyang University)
  • 김경범 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 김창일 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 정영훈 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 이영진 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 조정호 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 백종후 (한국세라믹기술원 전자소재융합본부 지능형전자부품팀) ;
  • 남산 (고려대학교 신소재공학과) ;
  • 성태현 (한양대학교 전기공학과)
  • Received : 2012.07.19
  • Accepted : 2012.09.24
  • Published : 2012.10.01

Abstract

Spring supported piezoelectric cantilever structures (SPCS) were fabricated for vibration-based energy harvester application. We selected four elastic springs (A, B, C, and D type) as cantilever's supporter, each elastic spring has a different spring constant (S). The C type of SPCS ($S_C$: 4,649 N/m) showed a extremely low resonance frequency of 81 Hz along with the highest power output of 38.5 mW while the A type of SPCS ($S_A$: 40,629 N/m) didn't show a resonance frequency while. Therefore, it is considered that the lower spring constant lead to a lower resonance frequency of the SPCS. In addition, a tip mass (18 g) at one end of the SPCS could further reduce the resonance frequency without heavy degradation of power output.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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